No, its not too dangerous. My son always liked the highest setting too. Its just a nice steady rock. He will be fine, the products are tested to make sure they are safe (untill they are recalled lol). If you are concerned you should tell your son/daughter, and if they think it is fine, then theres really nothing you can do, since it is your GRANDson, and not your son. Mwahahaa! LOL